"Follow me," said Eva Stellaris quietly, and stepped forward, through the milky wall. "Goodness me!” whispered Jos. "It's going to open just like intelligent glue!"
Photograph inspired by ‘Swart ster oor die Karoo’ (Black star over the Karoo) by Jan Rabie, 1957. In the novel future humans are living inside Table Mountain as it is too cold outside. There are no doors, but mirror like walls that you can walk through - but only if you are calm. Wouter ended up forgetting this and ran angrily towards someone, straight into the wall like you would run into a closed glass door, coming face to face with himself.